<template>
  <div class="app">
    <div id="root">
      <div class="todo-container">
        <div class="todo-wrap">
          <UserHeader :reverseTodo="reverseTodo" />
          <UserList :todos="todos"  :updateCheck ="updateCheck"/>
          <UserFooter :allNum="allNum" :doneNum="doneNum" :deleteAllTodo="deleteAllTodo" :updateAllCheck="updateAllCheck"/>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import UserFooter from './components/UserFooter'
import UserHeader from './components/UserHeader'
import UserList from './components/UserList'

export default {
  name: 'App',
  components: {
    UserFooter,
    UserHeader,
    UserList,
  },
  data() {
    return {
      todos: [
        {
          id: '001',
          title: '抽烟',
          done: true
        },
        {
          id: '002',
          title: '喝酒',
          done: false
        },
        {
          id: '003',
          title: '烫头',
          done: false
        },
      ]
    }
  },
  methods: {
    reverseTodo(val) {
      this.todos.unshift(val)
    },
    deleteTodo(id) {
      this.todos = this.todos.filter(item => item.id !== id)
    },
    updateCheck(id) {
      this.todos = this.todos.map(item => {
        if (item.id === id) {
          item.done = !item.done
        }
        return item
      })
    },
    deleteAllTodo() {
      this.todos = this.todos.filter(item => !item.done)
    },
    updateAllCheck(val) {
      //把所有的done改为val
      this.todos = this.todos.map(item => {
        item.done = val
        return item
      })
    }
  },
  computed: {
    allNum() {
      return this.todos.length
    },
    doneNum() {
      return this.todos.filter(item => item.done).length
    }
  },
  mounted() {
    this.$bus.$on('deleteTodo', this.deleteTodo)
  }
}
</script>

<style>
/*base*/
body {
  background: #fff;
}
.btn {
  display: inline-block;
  padding: 4px 12px;
  margin-bottom: 0;
  font-size: 14px;
  line-height: 20px;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}
.btn-danger {
  color: #fff;
  background-color: #da4f49;
  border: 1px solid #bd362f;
}
.btn-danger:hover {
  color: #fff;
  background-color: #bd362f;
}
.btn:focus {
  outline: none;
}
.todo-container {
  width: 600px;
  margin: 0 auto;
}
.todo-container .todo-wrap {
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
}
</style>
